CHAPTER 6 - MEASURING AND RECORDING WATER STAGE OR HEAD
6. Installation of Water-Stage Recorders
Important considerations in the installation of a water-stage recorder are the proper sizing and installation of a stilling or float well (if used) and the establishment of the reference datum for the site. The gage must be accessible at all times and substantially constructed for security and reliability. The recorder should be protected from the environment. The reference datum should be below the lowest stage of the stream or structure, and the instrument used to measure the stage must have the capability to cover the full range of water surface changes.